Why Is My Bermuda or Zoysia Lawn Turning Brown?

Why Is My Bermuda or Zoysia Lawn Turning Brown? Understanding Winter Dormancy

It happens every year across the South. One week your Bermuda or zoysia lawn looks lush and green, and the next it’s turning a dull tan. If you’re new to warm-season grass, it’s easy to assume something has gone badly wrong.

In most cases, nothing has. Your lawn is going dormant, a natural winter rest that warm-season grasses use to survive cold weather. A dormant lawn looks lifeless, but the grass is very much alive below the surface and will green up again in spring.

That said, not every brown lawn is simply dormant. Disease, insects, and winter dryness can also turn grass brown, and those problems need attention. This guide explains what dormancy is, how to tell dormant grass from dead or damaged grass, and how to care for your lawn until spring.

What is winter dormancy?

Bermuda and zoysia are warm-season grasses. They grow fastest in the heat of summer and slow down as temperatures fall. Once soil temperatures drop into the 50s, the grass stops growing and the blades lose their green color. Clemson Extension notes that Bermuda goes dormant and turns brown after frost.

Think of dormancy as hibernation. The grass blades you see turn brown, but the plant’s crowns, roots, rhizomes (underground stems), and stolons (above-ground runners) stay alive. They hold stored energy that powers new growth when the soil warms up in spring.

Dormancy is also a survival strategy. By shutting down top growth, the plant protects itself from cold injury. Research from Purdue University shows that zoysia handles cold better than Bermuda, which is one reason zoysia lawns often come through hard winters in better shape.

When do Bermuda and zoysia go dormant?

The timing depends on where you live and how quickly the weather cools. In general:

• Virginia and North Carolina (Richmond, Raleigh-Cary, Charlotte): These areas see the earliest frosts in the region, so lawns typically go dormant from late October into November and stay dormant the longest. Many neighborhoods here also have tall fescue lawns, which stay green all winter, so a brown Bermuda lawn can stand out next door.
• Georgia, Alabama, and Arkansas (Atlanta, Birmingham, Little Rock): Lawns usually go dormant in November, after the first frost. Alabama Extension notes that Bermuda stays dormant until warm temperatures return in mid-spring.
• North Florida (Jacksonville): UF/IFAS notes that lawns in North Florida go dormant in late fall or winter, usually later and for a shorter stretch than farther north.
• Central Florida (Tampa Bay): Dormancy is unpredictable. According to UF/IFAS, lawns here may stay green or turn brown in winter, and either can be normal. A lawn that stayed green all December can turn brown overnight after a freeze, and that is still dormancy, not death.

Bermuda and zoysia also look a little different when dormant. Bermuda usually turns a light tan or buff color. Zoysia tends toward a golden or straw color. Both are normal.

If you see green lawns next to brown lawns in your neighborhood, that doesn’t mean your neighbors know a secret. Many homeowners overseed Bermuda with ryegrass for winter color, or they have cool-season fescue lawns that stay green all winter.

Dormant or dead? 4 ways to tell

Dormant grass and dead grass can look almost identical from your front porch. Up close, there are clear differences.

1. Look at the pattern. Dormancy happens evenly. If your entire lawn turns tan over a week or two in late fall, that’s dormancy. If you see distinct brown patches, circles, or streaks surrounded by healthier grass, something else is going on.
2. Do the tug test. Grab a small handful of brown grass and pull gently. Dormant grass is anchored by living roots and holds firm. Dead grass often pulls out easily, with little or no root attached.
3. Check the crowns and runners. Dig up a small plug or pull back the grass at the soil line. According to the University of Tennessee, healthy rhizomes are fleshy and firm and usually snap when you tear them, even though they aren’t green. Dead runners are dry, hollow, or mushy, and they bend rather than snap.
4. Consider the timing. Brown grass right after the first frost is almost always dormancy. Brown grass in September, during warm weather and before any frost, points to drought, disease, or insects instead.

Other reasons a lawn turns brown in fall and winter

If your lawn fails the tests above, one of these is a likely cause.

• Large patch disease. This fungal disease is common in zoysia, especially in fall and spring when temperatures are cool and the grass is slowing down. It causes circular brown patches that can grow several feet wide, often with an orange or bronze edge while the disease is active. It thrives in wet, poorly drained areas.
• Grub damage. White grubs feed on roots in late summer and fall. Damaged grass feels spongy and can be rolled back like a loose carpet. Grub-damaged turf may also fail to recover from winter dormancy the following spring.
• Drought stress before dormancy. A dry fall can turn grass brown before the first frost. If your footprints stay visible in the lawn long after you walk across it, the grass is thirsty.
• Winter desiccation. During dry, windy winters, dormant grass can dry out and die, particularly on slopes and exposed spots. Because the lawn is already brown, this damage often isn’t noticed until spring.
• Shade and wet soil. Grass in heavy shade or low, soggy areas is weaker going into winter and slower to wake up. Wet soils also stay colder in spring, delaying green-up.

The tricky part is that a dormant lawn can hide these problems for months. If something looked off before your lawn went dormant, such as patches, thinning, or spongy areas, it’s worth having a professional take a look now rather than waiting until spring.

How to care for a dormant lawn this winter

A dormant lawn needs far less attention than a growing one, but a few habits make a real difference in how well it greens up in spring.

• Water only during dry spells. Clemson Extension notes that normal rainfall is usually enough for dormant grass unless the weather has been unusually dry or windy. If you go several weeks without rain, water lightly on a mild day when temperatures are above freezing. Florida’s sandy soils dry out faster: UF/IFAS suggests winter watering about every three to four weeks in North Florida and weekly or every other week in Central Florida, depending on rainfall.
• Skip the fertilizer. Dormant grass can’t use nitrogen. Fertilizing now mainly feeds winter weeds and can leave Bermuda more vulnerable to cold injury. Wait until spring, once the lawn has fully greened up. This applies in Florida too, even if your lawn still looks green: UF/IFAS advises against fertilizing from mid-October through April in North Florida, and from November through the end of March in Central Florida.
• Stay ahead of winter weeds. Weeds like henbit, chickweed, and annual bluegrass stand out against a brown lawn. A preemergent applied in fall prevents many of them, and existing weeds can be spot-treated on mild days. In North and Central Florida, avoid “weed and feed” products during winter, since they add fertilizer when the lawn can’t use it. See our guide to common lawn weeds for more.
• Keep leaves and debris off. A thick layer of fallen leaves blocks sunlight and traps moisture, which can weaken grass and encourage disease. Rake or mulch-mow them regularly.
• Limit heavy traffic. Dormant grass can’t repair itself. Regular foot traffic, parked vehicles, or a well-worn dog path can compact the soil and lead to thin or dead spots by spring.
• Stay off frosty grass. Walking on a frost-covered lawn breaks the brittle blades and can leave footprint-shaped damage.

Should you overseed with ryegrass?

If you’d rather have a green lawn all winter, overseeding with ryegrass is an option, but only for Bermuda. Clemson Extension generally recommends overseeding only Bermuda lawns, because of the extra inputs and plant competition involved. Zoysia does not handle the competition well.

Timing matters too. Ryegrass is usually seeded about 30 days before the first frost, so in the Carolinas, Virginia, Georgia, Alabama, and Arkansas, the window has passed for this year. Florida is later: UF/IFAS puts the seeding window at October to early November in North Florida and mid-November to early December in Central Florida, so Tampa Bay homeowners still have time. Whenever you consider it, weigh the tradeoffs: you’ll be mowing and watering all winter, and the ryegrass competes with your Bermuda for water and nutrients when it tries to green up in spring.

For most homeowners, letting the lawn go dormant is the simpler and healthier choice.

When will my lawn turn green again?

Bermuda and zoysia begin to green up once soil temperatures warm consistently in spring. That happens at different times across the Southeast. Central and North Florida lawns are usually first, often starting in March. Georgia, Alabama, and Arkansas lawns typically green up in April. In North Carolina and Virginia, green-up often stretches from April into early May. Within each area, Bermuda usually wakes up a little earlier than zoysia.

Don’t be alarmed if green-up is uneven. Areas in shade, on north-facing slopes, or with wet soil warm more slowly and may lag behind the rest of the lawn by a few weeks. New lawns are also more vulnerable in their first winter, because they haven’t yet built up the runners that help grass survive cold.

If parts of your lawn are still brown by late spring, after the rest has filled in, that’s the time to investigate. Do the tug test and check the runners again. Areas that don’t respond may need repair.

Get expert help with your warm-season lawn

A brown Bermuda or zoysia lawn in late fall is usually nothing to worry about. It’s the grass doing exactly what it’s designed to do. Keep it watered during dry spells, hold off on fertilizer, stay ahead of weeds, and your lawn should come back strong in spring.

If you’re not sure whether your lawn is dormant or in trouble, Joshua Tree Experts can help. Our lawn care teams serve homeowners across Charlotte, Raleigh-Cary, Richmond, Atlanta, Birmingham, Greater Little Rock, Jacksonville, and Tampa Bay. We can diagnose problems, build a lawn care program for your grass type, and make sure your lawn is set up for a healthy green-up. Schedule a quote today or call us at 833-583-8733.